16535668194 has 96 divisors (see below), whose sum is σ = 38374015680. Its totient is φ = 5130953856.

The previous prime is 16535668087. The next prime is 16535668229. The reversal of 16535668194 is 49186653561.

16535668194 is a `hidden beast` number, since 1 + 65 + 3 + 566 + 8 + 19 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 16535668194.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5590564 + ... + 5593520.

It is an arithmetic number, because the mean of its divisors is an integer number (399729330).

Almost surely, 2^16535668194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16535668194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19187007840).

16535668194 is an abundant number, since it is smaller than the sum of its proper divisors (21838347486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16535668194 is a wasteful number, since it uses less digits than its factorization.

16535668194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3264 (or 3261 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 16535668194 in words is "sixteen billion, five hundred thirty-five million, six hundred sixty-eight thousand, one hundred ninety-four".